Art of joining metal parts



H. P. MACDONALD ANO W. S. THOMSON.

ART 0F JOINING METAL PARTS.

APPLICATION FILED APRHU 1919.

PatentedAug. 23, 1921G4 lll UNITED STATES PATENT OFFICE.'

HARRY P. MACDONALD, OF MONTCLAIR, NEW JERSEY, AND WILLIAM S. THOMSON, OF PLANTSVILLE, CONNECTICUT, ASSIGNORS T0 THE SNEAD & CO. IRON WORKS,

OF JERSEY CITY, NEW JERSEY, A

CORPORATION OF NEW JERSEY.

ART OF JOINING- METAL IriARTS.

Specification of Letters Patent.

Application filed April 4, 1919. Serial No. 287,570.

To all whom may concern.'

lido it ltnon'n that we, HARRY P. Maonorviinn and llTrLLrAi-i S. THOMSON, citizens ot the llnited States, respectively, residing at ltlontclair, county of Essex, and State of ltciv Jersey, and lllantsville, county of llarti'ord, and State ot tlonnecticut, have invented certain new and useful Improvements in the .trt oit Joining Metal Parts, ol which the following is a specification.

'llhis invention relates to the art of joining metal parts and is in the nature of an improvement on the invention shown and described in ico-pending' application ot ltlarry P, Macdonald tiled January 30, 1919, Serial llo.- 273,97ll- The invention is ot particular value in joining;V tubes to other metallic parts ot automotive propeller assembliesn One ot the primary objects oit our invention is the provision ot a simple and inexpensive joint provided with improved means for preventine; relative shitting oit the parts.

'llhe ltoregoiup; together with such other objects as may hereinafter appear, are accomplished by means ot a process and apparat-us illustrated in preferred form in the .accompanyingn drawings, wherein-- Figure l is a section through a piece of steel tubing joined to a metal part such for example as a three arm spider, constituting a part ot a coupling; Fig., 2 is a side elevation and partial section oi Fig. l; F ig. 3 is an end elevation ot Fig. 2; and Fig. t is a sectional vievv showing the disposition ot the parts in an intermediate stage of manufacture.

ln carryinp,n out our invention We provide the spider ti, or other part to which the tubing ti is to be joined, With a central apertiu'e or hole l'. lliat portieri ot the aperture at the inner end ot' the spider is preferably machined and has a diameter 7which slightly smaller than the outside diameter ot the tube at trent end. 'lliat portion ot the aperture at the outer end oit the spider 5, indicated by the reference nuincral ",is enlarged, beinp; preferably' given a hexagonal or other irregular shape as indicated in Figs.. l and 3. The spider 5 is provided with entstandingrV lips or lues tl adjacent the enlarrrsl portion 7a ot the aperture.

ln carrying, out our process the spider i 4iiciently to permit of Iits is heated so as to cause it to expand sufu being' slipped over the end el'u the tube, the spider slirinlrinnr fast on to the tube when it has cooledm llel tore the coolingn has been completed the outer end ol" the tube is heated, as lor e1rample by means of an acetylene torch or other device, and a Wedge 9 is forced into the tube, thereby expanding the tubo and forcing' it tightly into the enlarged portion la of the aperture. The *vredige 9 is prefer ably provided with a cylindrical portion 9a having); a diameter closely approniinatinijn theinside diameter of the tube and an enlarged portion 9b. which, is ,driven a shape corresponding to that ot the enlarged portion 7 of the aperture. j

The inner edges ot ,the Wedge il are rounded to facilitate insertion and the juncture between the cylindrical portion and the enlarged portion ot the central opening) in the spider 5 are eased ell so as to not leave any abrupt corners which would cause too much local distortion in the tube when enu panded into place.

The Wedge 9 may be lett in place or Withf drawn. ln either case the lips or lungs are folded or bent down over the end oit' the tube and over the end et the Wedge, il the Wedge be allowed to remain, thus assisting; in l1 olding the parts in position and preventing longitudinal shitting ot the tube and spider relative to each other. 'lhe erp-ian- Patcnted Aug. 23, 1921.

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sion ot the tube into the irregular shaped opening,f 'la noted above not only prevents relative rotation ot the parts, as in a certain measure does theshrinlrapge bond between the cylindrical portion ot the spider' and the tube, but also prevents longitudinal shitting ot the spider with reference to the tube in one directionu 'llhe bent over luirs prevent longitudinal shittinpgin the opposite direc-- tion. llt will be obvious portion l may be ot any shape capable oit produc' desired results and also that etjuivaleia, means may be substituted tor the lips The joint is a simple and inenpensive one and vhas ,egreat strength Vand riiridity. wllre invention is also advantageous in that the lips 8 form. a substitute tor iveldinp; the end ot the tube to the spider, so that any possible injury 'to the metal resultinir1 from the tvoldinp, temper t may 'be avoidedv that the enlarpged lill l ll tl l tl 1. As a new article of'manufacture, s torque transmitting device comprising a tubular member, a spider member adapted to connect said vtubular member to an adjacentpart, saidtspider having a hub to recelve an end of the tubular member, the opening in the hub being enlarged to a non-circular section of greater diameter than the tubular.

member, a wedge for expanding the tube in such enlarged portion, and lug means on the spider member overlying the end of the 'cular section of greater diameter than the tubular member, the end of the tube being enlarged to fit said enlarged opening, and lug means on the sleeve-like member overlying the end of the'tubular member.

3. As a new article of manufacture, av

round tube, a sleeve-like member adapted to receive an end of said tube and tightly fitting the same, said end of the tube being enlarged to a non-circular section and the opening inthe sleeve being similarly enlarged, and a portion of said sleeve-like mmber being deformed over the end of the tu e.

In testimony whereof, we have hereunto ysigned our names.

HARRY P. MACDONALD. WILLIAM s. THOMSON. 

